Very often the dream is forgotten by the dreamer till he hears of or sees the event.

He is then either reminded of his dream by association of ideas or _he has never dreamed at all_, and his belief that he has dreamed is only a form of false memory, of the common sensation of "having been here before," which he attributes to an awakened memory of a real dream.

Still more often the dream is unconsciously cooked by the narrator into harmony with facts.
As a rule fulfilled dreams deal with the most trivial affairs, and such as, being usual, may readily occur by chance coincidence.

Indeed it is impossible to set limits to such coincidence, for it would indeed be extraordinary if extraordinary coincidences never occurred.
To take examples:-- THE PIG IN THE DINING-ROOM Mrs.Atlay, wife of a late Bishop of Hereford, dreamed one night that there was a pig in the dining-room of the palace.

She came downstairs, and in the hall told her governess and children of the dream, before family prayers.